acarids

n.very small free-living arachnid that is parasitic on animals or plants; related to ticks

1. The acarids in the sample were identified under the microscope.
   样本中的螨类在显微镜下被鉴定出来。
2. Farmers often use pesticides to control acarids that infest their crops.
   农民经常使用杀虫剂来控制侵染作物的螨类。